Yazzo Quick Connect Cubic

I want to quickly and easily throw together different types of space frames. Basically, I need adult sized tinker toys, with enough accessories that I can have structural support, can throw on some electronics, etc.

This set of things is designed for the construction of rectangular frames. There is a vertex, a pass-thru, and a stackable. There is also a shelf piece which will take 1/8" shelving, whether acrylic or plywood, or whatever.

UPDATE: 18 Dec 2010
Added cubon.scad and connectco